Coefficient of friction determination method for a vehicle steered wheel in which vehicle driving parameters and actual return torque acting on the wheel are measured and used to calculate the coefficient

摘要

The method for determining the coefficient of friction (mu ) in a vehicle with at least one steered wheel on which a return torque (MR) acts when the vehicle is following a curved trajectory. The method has the following steps: determination of an actual return torque using a steering torque sensor; determination of actual dynamic driving values from which a theoretical return torque can be calculated, and; determination of the friction coefficient from the actual return torque and the actual dynamic driving parameters. An independent claim is also included for a method for determining the friction coefficient from the actual and theoretical return torque values.